如何附加一个新的wtforms FormField作为默认的初始数据? [英] How to append a new wtforms FormField with initial data as default?
问题描述
我有一个带有 wtform
的表单,我想要添加一个新窗体 JobItemForm
到我的窗体 JobForm
使用 append_entry
。 JobItemForm
具有 selectField
名为 company
。我通过像这样的模型添加选择字段数据
$ b $ $ $ $ $ $ $ $ $ $ $ $ form.jobs [0] .company.choices = company_list
现在我使用 append_entry
没有任何选择,我收到一个错误。那么如何用一些初始数据调用 append_entry
?
$ p $
类JobItemForm (Form):
company = SelectField(_('company'),description = _('< a href =/ education / institute / add /&new company< / a>') )
title = TextField(_('title'),[validators.Length(min = 4,max = 250)])
date_from = DateField(_(date_from),format ='% (_(date_to),format ='%y-%m-%d')
description = TextAreaField(_ ))
$ b class JobForm(Form):
jobs = FieldList(FormField(JobItemForm),min_entries = 3)
add_job = SubmitField(_ '))
有些事情是这样的
@ mod.route('/ edit /',methods = ['GET','POST'])
@login_required $ b $ def edit_job():
$
编辑工作
company_list = Company.Company_list()
form_title =编辑工作表单
如果request.method!='POST':
form = JobForm()
form.jobs [0] .company.choices = company_list
return render('form.html',form = form,form_title = form_title)
form = JobForm(request.form)
if form.add_job.data:
new_item_job = form.jobs.append_entry()
new_item_job.company。选择= company_list
return form('form.html',form = form,form_title = form_title)
$ b $ form.validate
if form.errors!= dict():
return render('form.html',form = form,form_title = form_title)
#保存数据
flash(_(Edit successful!))
return render('注册/ succesful.html')
这样做:
form.jobs [0] .company.choices = company_list
平台具有GAE,Django和SQLAlchemy的扩展, m支持的表单域。 扩展程序的文档。
<对于sqlalchemy,它是这样工作的:
from wtforms.ext.sqlalchemy.fields import QuerySelectField
def fill_field():
return Model.query
$ b myfield = QuerySelectField(query_factory = fill_field)
这段代码自动填充数据库模型中的选项。
(我没有实际的错误,所以我我只是在这里猜测)
您在add_job之后没有选择错误的原因是因为只有当它是GET请求时才填充选项。您需要在Post请求之后添加选项,如下所示:
def your_view():
form = YourForm )
form.fieldname.choices = choice_list
#这里是你的GET和POST请求代码
I have a form with wtform
, I want to add a new form JobItemForm
to my form JobForm
using append_entry
. JobItemForm
has selectField
named company
. I add choice field data via model like this
form.jobs[0].company.choices = company_list
now I use append_entry
without any choices and I recieve an error. So how can I call append_entry
with some initial data?
class JobItemForm(Form):
company = SelectField(_('company'), description=_('<a href="/education/institute/add/">new company"</a>'))
title = TextField(_('title'), [validators.Length(min=4, max=250)])
date_from = DateField(_("date_from"), format='%Y-%m-%d')
date_to = DateField(_("date_to"), format='%Y-%m-%d')
description = TextAreaField(_('description'))
class JobForm(Form):
jobs = FieldList(FormField(JobItemForm), min_entries=3)
add_job = SubmitField(_('Add job'))
some thing like this
@mod.route('/edit/', methods=['GET', 'POST'])
@login_required
def edit_job():
"""
edit job
"""
company_list = Company.Company_list()
form_title = "Edit job Form"
if request.method != 'POST':
form = JobForm()
form.jobs[0].company.choices = company_list
return render('form.html', form=form, form_title=form_title)
form = JobForm(request.form)
if form.add_job.data:
new_item_job = form.jobs.append_entry()
new_item_job.company.choices = company_list
return render('form.html', form=form, form_title=form_title)
form.validate
if form.errors != dict():
return render('form.html', form=form, form_title=form_title)
# save data
flash(_("Edit successfully!"))
return render('registration/succesful.html')
There is a better way to do this:
form.jobs[0].company.choices = company_list
Wtforms has extensions for GAE,Django and SQLAlchemy which supports orm backed form fields. Documentation of extensions.
For sqlalchemy, it works like this:
from wtforms.ext.sqlalchemy.fields import QuerySelectField
def fill_field():
return Model.query
myfield = QuerySelectField(query_factory=fill_field)
This snippet of code automatically fills the choices for you from the database model.
(I do not have you actual error so I am just guessing here)
The reason you are getting no choices error after add_job because you are filling choices only when it is a GET request. You need to add choices after a Post request too like this:
def your_view():
form = YourForm()
form.fieldname.choices = choice_list
# Here comes your code for GET and POST request both
这篇关于如何附加一个新的wtforms FormField作为默认的初始数据?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!